1.-Why does she always ask you for help?
-There is no one else--------,is there?
A.who to turn to B.she can turn to
C.for whom to turn to D.for her to turn
2.Last month ,part of Southeeast Asia was stuck by floods,from ----effects the people are still suffering.
A.that B.whose C.those D.what
3.Frank's dream was to have his own shop--------to produce the workings of his own hands.
A.that B.in which C.by which D.how
请详细解答，谢谢

1.B 先行词作宾语，联系代词可以省略。
为什么她总是请你帮忙？
因为她没有别人可以求助了，不是吗？
turn to sb固定搭配

2.B 上月，亚洲东南遭遇洪水侵袭，现在人们还收到洪水的影响。
whose effect即the effect of the flood

3. B Frank的梦想是有一间自己的商店，在那里他可以亲自动手制作。
in which,即in the shop